Suppose that the Dirichlet form \(({\cal E},{\cal F})\)  is regular.
Then there exists an \(m\) -symmetric Hunt process \({\mathbf {M}}\)  on \(X\) 
whose Dirichlet form is \(({\cal E},{\cal F})\)  ([1]}).
We also know that a set \(N\subset X\)  is exceptional
if and only if \(\mathop {\rm Cap}(N)=0\)  ([1]}).
